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- W2961144892 endingPage "165610" @default.
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- W2961144892 abstract "Abstract The oscillation frequency of the circular skyrmion motion in a nanodisk increases with the driving current density. However, the skyrmion may be destroyed at the nanodisk edge when the driving current density is larger than a threshold, which leads to a maximum oscillation frequency that may not be enough for ultrahigh frequency applications based on skyrmions. In this work, a modified nanodisk structure, in which a skyrmion can be driven by a large current density, is proposed. Numerical simulations demonstrate that when the edge of a ferromagnetic nanodisk has enhanced perpendicular magnetic anisotropy, the upper threshold of the skyrmion oscillation frequency can be increased by 75% compared to the original structure without enhanced edge. Our results may be useful for overcoming the frequency limit of the skyrmion-based spin-torque oscillator, which utilizes the current-induced oscillation of a skyrmion as the source of microwave power." @default.
- W2961144892 created "2019-07-23" @default.
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- W2961144892 date "2019-12-01" @default.
- W2961144892 modified "2023-09-29" @default.
- W2961144892 title "A skyrmion-based spin-torque nano-oscillator with enhanced edge" @default.
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- W2961144892 doi "https://doi.org/10.1016/j.jmmm.2019.165610" @default.
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